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#!/bin/bash -eu
# Copyright 2018 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
################################################################################
# Case-sensitive names of internal Firefox fuzzing targets. Edit to add more.
FUZZ_TARGETS=(
SdpParser
StunParser
ContentParentIPC
# Targets which are available but disabled.
# Qcms
# ContentSecurityPolicyParser
)
# Firefox object (build) directory and configuration file.
export MOZ_OBJDIR=$WORK/obj-fuzz
export MOZCONFIG=$SRC/mozconfig.$SANITIZER
# Install dependencies. Note that bootstrap installs cargo, which must be added
# to PATH via source. In a successive run (for a different sanitizer), the
# cargo installation carries over, but bootstrap fails if cargo is not in PATH.
export SHELL=/bin/bash
[[ -f "$HOME/.cargo/env" ]] && source $HOME/.cargo/env
./mach bootstrap --no-interactive --application-choice browser
source $HOME/.cargo/env
# Update internal libFuzzer.
(cd tools/fuzzing/libfuzzer && ./clone_libfuzzer.sh HEAD)
# Build! Takes about 15 minutes on a 32 vCPU instance.
./mach build
./mach gtest buildbutdontrun
# Packages Firefox only to immediately extract the archive. Some files are
# replaced with gtest-variants, which is required by the fuzzing interface.
# Weighs in shy of 1GB afterwards. About double for coverage builds.
./mach package
tar -xf $MOZ_OBJDIR/dist/firefox*bz2 -C $OUT
cp -L $MOZ_OBJDIR/dist/bin/gtest/libxul.so $OUT/firefox
cp $OUT/firefox/dependentlibs.list $OUT/firefox/dependentlibs.list.gtest
# Get absolute paths of the required system libraries.
LIBRARIES=$({
xargs -I{} ldd $OUT/firefox/{} | gawk '/=> [/]/ {print $3}' | sort -u
} < $OUT/firefox/dependentlibs.list)
# Copy libraries. Less than 50MB total.
mkdir -p $OUT/lib
for LIBRARY in $LIBRARIES; do cp -L $LIBRARY $OUT/lib; done
# Build a wrapper binary for each target to set environment variables.
for FUZZ_TARGET in ${FUZZ_TARGETS[@]}
do
$CC $CFLAGS -O0 \
-DFUZZ_TARGET=$FUZZ_TARGET \
$SRC/target.c -o $OUT/$FUZZ_TARGET
done
cp $SRC/*.options $OUT
# SdpParser
find media/webrtc -iname "*.sdp" \
-type f -exec zip -qu $OUT/SdpParser_seed_corpus.zip "{}" \;
cp $SRC/fuzzdata/dicts/sdp.dict $OUT/SdpParser.dict
# StunParser
find media/webrtc -iname "*.stun" \
-type f -exec zip -qu $OUT/StunParser_seed_corpus.zip "{}" \;
cp $SRC/fuzzdata/dicts/stun.dict $OUT/StunParser.dict
# ContentParentIPC
cp $SRC/fuzzdata/settings/ipc/libfuzzer.content.blacklist.txt $OUT/firefox
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